Document 293 -1
CCFL Transformers
FL3209 parts have been improved.
The new FL3209-5L and FL3209-6L are electrically
equivalent to the FL3209-1L, FL3209-2L, FL3209-3L
and FL3209-4L, and have an improved physical de-
sign. We will continue to support existing customers
of the superseded parts.
The FL Series of transformers is designed for use in cold
cathode fluorescent lamp (CCFL) power supplies at op-
Turns ratio
Part
number
1
Schematic Package pri : sec pri : fb
FL2015-1L_
FL2015-2L_
FL2015-3L_
FL2015-4L_
FL2015-5L_
FL2015-6L_
FL2015-7L_
FL2015-8L_
FL2015-9L_
FL2015-10L_
FL3209-5L_
FL3209-6L_
FL2810-1L_
B
A
A
A
A
B
A
A
A
A
C
D
C
1
1
1
1
1
1
1
1
1
1
5
5
4
1
:
67
1
:
67
1
:
100
1
:
50
1
:
125
1
:
67
1
:
67
1
:
86
1
:
100
1
:
93
1
:
100
1
:
93
1
:
100
1
:
0.19
1
:
0.19
1
:
0.25
1
:
0.14
1
:
0.38
1
:
0.19
1
:
0.19
1
:
0.21
1
:
0.25
1
:
0.25
—
1
:
0.17
—
erating frequencies up to 100 kHz. With output power
from 3.5 to 6.0 Watts, these transformers are ideal for
LCD backlight applications. They are available in two
different gull wing, surface mount packages and one in-
board configuration for height restricted designs.
Free evaluation samples are available by contacting
Coilcraft or ordering them on-line at
www.coilcraft.com.
Vrms
3
Output Inductance
2
Imax
(Watts) nom (µH) sec (mA) pri
sec
6.0
6.0
6.0
6.0
6.0
6.0
6.0
6.0
6.0
4.5
3.5
3.5
4.5
43
43
19
44
20
48
50
31
22
40
48
40
35
5.0
5.0
5.0
7.0
7.0
11.0
11.0
11.0
11.0
11.0
5.0
5.0
7.0
22
23
16
32
12
23
23
18
16
17
16
17
15
1600
1600
1600
1600
1600
1600
1600
1600
1600
1600
1600
1600
1500
Vinst max
4
pri
sec
25.0
29.0
20.0
40.0
16.0
29.0
29.0
23.0
20.0
21.0
20.0
21.0
16.5
2000
2000
2000
2000
2000
2000
2000
2000
2000
2000
2000
2000
1650
DCR max (Ohms)
pri
sec
fb
0.220
0.220
0.190
0.220
0.160
0.160
0.160
0.132
0.132
0.175
0.350
0.400
0.220
285
285
285
165
330
176
176
176
176
675
362
800
500
0.10
0.10
0.10
0.10
0.10
0.10
0.10
0.10
0.10
0.50
—
0.08
—
1. When ordering, please specify a
packaging
code:
FL2810-1LD
Packaging: D
= 13″ machine ready reel. EIA-481 embossed plastic
tape.
Package 1: 400 parts per full reel.
Package 4: 750 parts per full reel.
Package 5: 1000 parts per full reel.
B
= Less than full reel. In tape, but not machine ready.
To have a leader and trailer added ($25 charge),
use code letter D instead.
2. Inductance is measured across both halves of the primary.
3. Vrms = continuous voltage.
4. Vinst = instantaneous voltage at startup.
5. Ambient operating temperature range
−40°C
to +85°C.
6. Electrical specifications at 25°C.
Isolation
(tested for one minute)
Part
number
FL2015
FL3209
FL2810
Primary to
secondary
1500 Vrms
500 Vrms
1500 Vrms
Primary to
feedback
500 Vrms
500 Vrms
—
All windings
to core
1500 Vrms
1500 Vrms
1500 Vrms
Note: For Schematic B, primary is connected to secondary at
pin 3. The primary is not isolated from the secondary.
Schematics
A
1
8
1
B
3
2
C
6
2
D
6
Primary
3
Secondary
5
2
Primary
3
Secondary
5
2
9
Primary
3
Primary
3
4
9
7
Secondary
4
1
Secondary
Feedback
5
Feedback
4
Feedback
4
7
For Royer
topology
For Royer
topology
For flyback
topology
For Royer
topology
Specifications subject to change without notice.
Please check our website for latest information. Document 293-1
Revised 02/10/09
© Coilcraft, Inc. 2009
Document 293 -2
CCFL Transformers
Package 1
0.310
max
7,87
10
1
0.044
1,13
0.004/0,10
0.965 max
24,51
0.028 typ
0,70
0.975
min
24,77
0.825
max
20,96
1
7
10
0.075
min
1,91
6
0.050
1,27
0.610
max
15,49
7
0.098 cen
2,50
10
Recommended
Land Pattern
1
6
0.098 cen
2,50
Weight:
5.5 – 6.1 g
Terminations:
Tin-silver over tin over nickel over phos-bronze
Tape and reel:
400/13″ reel 44 mm tape width
For packaging data see Tape and Reel Specifications section.
Package 4
0.205 max
5,21
9
1
0.037
0,93
1.275 max
32,39
0.004/0,10
1.295
32,89
0.063 cen
1,60
7
0.028
0,70
9
1.100
27,95
1
1.163
29,54
6
0.402 max
10,21
7
6
0.240
6,10
9
Recommended
Land Pattern
0.030
0,76
1
0.319
8,10
0.063
1,60
0.020
(7×)
0,50
Weight:
3.6 g
Terminations:
Tin-silver over tin over nickel over phos-bronze
Tape and reel:
750/13″ reel 44 mm tape width
For packaging data see Tape and Reel Specifications section.
0.057
1,45
0.066
min
1,68
Specifications subject to change without notice.
Please check our website for latest information. Document 293-2
Revised 02/10/09
© Coilcraft, Inc. 2009
Document 293 -3
CCFL Transformers
Package 5 – In-board mounting
Dot indicates pin 1
8
0.016
typ
0,40
1
8
Recommended
Land Pattern
Minimum PCB cutout
0.382 × 1.173
9,70 × 29,80
0.020
0,51
1
0.366 max
9,30
7
6
0.063 cen
1,60
7
0.137
min
3,48
1.440
min
36,58
6
0.063 cen
1,60
0.225 max
5,72
7
1.165
29,60
1.439 max
36,55
6
0.150 max
3,81
In-board Mounting
Weight:
3.8 – 4.0 g
Terminations:
Tin-silver over tin over copper over copper-steel
Tape and reel:
1000/13″ reel 56 mm tape width
For packaging data see Tape and Reel Specifications section.
Specifications subject to change without notice.
Please check our website for latest information. Document 293-3
Revised 02/10/09
© Coilcraft, Inc. 2009
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